SC-502 Intensity Stuck at Maximum

Giovanni Carboni

Hello guys,

I am new here and this is my first question.

In my SC-502 scope the intensity is stuck to the maximum value and the knob cannot adjust it. I could reduce the intensity by reducing the beam current but I would like to fix the adjustable control. I measured voltages on the various transistors and checked waveforms but no results. Has anybody ecountered the same problem?


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